Lidocaine injection of pericranial myofascial trigger points in the treatment of frequent episodic tension-type headache

Table 3 Comparison of the frequency of painful days belonging to all groups before and after treatment

		Group 1	Group 2	Group 3	Group 4	* p
FPD before treatment	N	27	27	27	27	0.9272
	Mean	11,1	10,8	11,0	11,0
	SD	1,7	1,8	1,6	2,2
	Minimum	8	7	8	7
	Maximum	14	14	13	14
FPD for 2 months after treatment	Mean	10,4	8,4	9,9	6,6	<0.0001
	SD	1,2	2,4	1,3	2,2
	Minimum	9	4	7	2
	Maximum	12	13	12	10
	Comparison	G1 vs G2	G1 vs G3	G2 vs G4	G3 vs G4
	p value	^a 0.0003	^a 0.1708	^a 0.0071	^a <0.0001
FPD for 4 months after treatment	Mean	10,9	8,8	10,7	7,6	<0.0001
	SD	1,6	2,3	1,6	1,9
	Minimum	8	5	8	4
	Maximum	14	13	14	11
	Comparison	G1 vs G2	G1 vs G3	G2 vs G4	G3 vs G4
	p value	^a 0.0004	^a 0.8007	^a 0.0466	^a <0.0001
FPD for 6 months after treatment	Mean	11,1	10,3	10,9	7,9	<0.0001
	SD	1,4	2,4	1,5	2,0
	Minimum	9	6	8	4
	Maximum	14	15	14	11
	Comparison	G1 vs G2	G1 vs G3	G2 vs G4	G3 vs G4
	p value	^a 0.1506	^a 0.7068	^a 0.0003	^a <0.0001

N: Number of patients, SD: Standard deviation, * One-way Analysis of Variance (ANOVA), FPD: Frequency of painful days per month. If p value obtained by ANOVA is <0.05, p values of between groups (G1,G2,G3 and G4) are compared.

ISSN: 1129-2377